PyTorch基本数据类型及其占用空间大小

PyTorch上的常用数据类型如下

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Data type	dtype	CPU tensor	GPU tensor	Size/bytes
32-bit floating	torch.float32 or torch.float	torch.FloatTensor	torch.cuda.FloatTensor	4
64-bit floating	torch.float64 or torch.double	torch.DoubleTensor	torch.cuda.DoubleTensor	8
16-bit floating	torch.float16or torch.half	torch.HalfTensor	torch.cuda.HalfTensor	-
8-bit integer (unsigned)	torch.uint8	torch.ByteTensor	torch.cuda.ByteTensor	1
8-bit integer (signed)	torch.int8	torch.CharTensor	torch.cuda.CharTensor	-
16-bit integer (signed)	torch.int16or torch.short	torch.ShortTensor	torch.cuda.ShortTensor	2
32-bit integer (signed)	torch.int32 or torch.int	torch.IntTensor	torch.cuda.IntTensor	4
64-bit integer (signed)	torch.int64 or torch.long	torch.LongTensor	torch.cuda.LongTensor	8

以上PyTorch中的数据类型和numpy中的相对应，占用字节大小也是一样的
数据类型转换

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Reference
[1] https://pytorch.org/docs/stable/tensors.html
[2] https://blog.youkuaiyun.com/u010099080/article/details/53411703